Finding the Fourth Proportional to 2,261,719.12, 3,121,132.36 and 1,243,123.60
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Solution
The fourth proportional to 2,261,719.12, 3,121,132.36 and 1,243,123.60 is: 1,715,488.57
Step by Step Solution
- Step 1: Write the proportion equation
2,261,719.12 : 3,121,132.36 = 1,243,123.60 : x - Step 2: Convert to fraction form
2,261,719.12/3,121,132.36 = 1,243,123.60/x - Step 3: Cross multiply
2,261,719.12x = 3,121,132.36 × 1,243,123.60 - Step 4: Simplify right side
2,261,719.12x = 3,879,953,295,439.70 - Step 5: Solve for x
x = 3,879,953,295,439.70/2,261,719.12 - Step 6: Final answer
x = 1,715,488.57
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.